CN106525573A - Self-adaptive clamp for superconductive multi-strand wire - Google Patents
Self-adaptive clamp for superconductive multi-strand wire Download PDFInfo
- Publication number
- CN106525573A CN106525573A CN201611141685.7A CN201611141685A CN106525573A CN 106525573 A CN106525573 A CN 106525573A CN 201611141685 A CN201611141685 A CN 201611141685A CN 106525573 A CN106525573 A CN 106525573A
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- China
- Prior art keywords
- clamp
- wedge shape
- support shaft
- fixture block
- fixture
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
Abstract
The invention discloses a self-adaptive clamp for a superconductive multi-strand wire. The self-adaptive clamp comprises a support shaft, a moveable control component, a clamp cover, a conical chamber and a plurality of wedge-shaped clamp blocks which are annularly and uniformly distributed at the lower end of the conical chamber, wherein a pressure bearing is arranged on a middle part of the moveable control component connected with the support shaft; a snap spring is arranged at the upper end, so that the positions of the moveable control component and the support shaft are relatively fixed; an inner wall of the moveable control component is connected with the upper part of the clamp cover through a thread; the lower part of the clamp cover is fixedly connected with the conical chamber; a test piece is placed at a clamp opening; the moveable control component is rotated for driving the clamp cover and the conical chamber to wholly upward or downward move, so that an annular opening at the lower end of the conical chamber is upward moved and the wedge-shaped clamp blocks are gathered toward the center so as to clamp the superconductive multi-strand wire or the annular opening at the lower end of the conical chamber is downward moved and the wedge-shaped clamp blocks are dispersed so as to release the superconductive multi-strand wire. The self-adaptive clamp can supply annularly uniform distributed clamping force; all the strands can be uniformly stressed; the relative sliding of the strands in the multi-strand wire can be avoided; the accuracy of the experimental data can be guaranteed; the application scope is wide; the self-adaptive clamp can be normally used under normal temperature and low temperature environments.
Description
Technical field
The present invention relates to a kind of Self adapting fixture, refers specifically to a kind of for multiply multicore cable（Superconducting Strand）Carry out performance
The Self adapting fixture of test.
Background technology
Multicore cable（Strand）It is widely used in power equipment, as the core component of superconducting magnet, superconducts in pipe
Cable（CICC）Mainly formed by multistage Superconducting Strand coiling, Superconducting Strand carries the transmission work of supercurrent inside superconducting magnet
Make.Basic structure material of the Superconducting Strand as large scale superconducting magnet, its deformation mechanics performance under plus load are subject to many
The combined influence of the factor of kind；Especially under the complex environment of many factors such as low temperature, strong-electromagnetic field coupling, the synthesis of Superconducting Strand
Mechanical property and behavior are directly connected to the safety and stablization operation of ITER.Therefore, carry out Superconducting Strand in room temperature and low temperature etc.
Related Experiments of Machanics under environment are just particularly important, and fixture is indispensable utensil in related Experiments of Machanics, and which is right
The clamping effect of Superconducting Strand has important impact to experimental result.
The fixture of electronic universal tester is mostly Wedge gripping, and retained part is made up of two wedges in left and right, chuck
It is plane and V-shape.As shown in Figure 14,15, when clamping to strand, both chucks are with the contact point of strand in non-homogeneous
Distribution, on the one hand can cause to change to the original structure of retained part, pressing from both sides of being subject to of each stock in strand when on the other hand causing clamping
Holding force is uneven, causes that the drawing load born by each stock is also different, and each stock can produce different strains and sliding, cause what is measured
There is distortion in strand stretching experiment data.Also experiment transforms plane chuck so as to which surface has semicircle
The groove of shape, but as improved arc radius are fixed, therefore the clamping of different-diameter strand cannot be adapted to, for different-diameter
The actual clamping effect of strand is as shown in figs. 16-18.Additionally, the contact surface of common plane chuck and V-shaped chuck and test specimen
Product is less, when artificial applying power reaches clamped condition, it is impossible to provide enough chucking powers, causes test specimen to deposit with fixture in experiment
In a certain degree of changing of the relative positions, so that experimental result is inadvisable.
And hydraulically operated fixture can provide larger chucking power in clamping test pieces, for common standard or non-standard component
Experiment, with good experiment effect.But its clamp Superconducting Strand when, due to hydraulically operated fixture chucking power it is larger, clamping part
The strand for dividing can produce moderate finite deformation；Meanwhile, the retained part of hydraulically operated fixture is similarly plane chuck or V-shaped chuck, equally
So that each stock can produce different degrees of strain and sliding, the strand experimental data measured is caused to there is problem of dtmf distortion DTMF.And for
Superconducting Strand experiment at low temperature, hydraulically operated fixture cannot be in low temperature due to the restriction of its principle（Liquid nitrogen）Work under environment, and
Outside fixture is placed in cryostat so that the length of Superconducting Strand is multiplied, the waste that causes superconducting line unnecessary and into
This increase.
During the present invention is realized, it has been found that existing fixture at least exists to provide and is uniformly distributed or enough
Chucking power so that each stock meeting Relative sliding of Superconducting Strand or the changing of the relative positions, causes the strand experimental data distortion measured, and to superconduction stock
The contour structures of line cause the defects such as change.
The content of the invention
For above-mentioned technical problem, the invention provides a kind of superconduction multi cord Self adapting fixture, can provide to strand
With annular equally distributed chucking power so that each stock uniform force, it is to avoid each stock Relative sliding of Superconducting Strand or the changing of the relative positions, it is ensured that
The degree of accuracy of strand experimental data, reduces the impact to ply yarn structure, and it is Bu Tong straight with low temperature environment to can be suitably used for room temperature
The experiment of footpath strand.
The present invention is achieved through the following technical solutions：
A kind of superconduction multi cord Self adapting fixture, including the mobile control piece, clamp cover and taper that are sleeved in support shaft successively
Chamber, and it is movably arranged on several wedge shape fixture blocks of support shaft lower end；Wherein, the middle part that mobile control piece is connected with support shaft sets
There is a pressure bearing, mobile control piece upper end is provided with jump ring, make to move position of the control piece in support shaft and be relatively fixed；Mobile control
Product inwall is threaded connection with clamp cover top, and clamp cover bottom is fixedly connected with conical cavity, and wedge shape fixture block is equal along annular
The even annular mouth for being distributed in conical cavity lower end；Superconducting Strand is placed on the fixture mouth formed by wedge shape fixture block, control in rotary moving
Product, drives clamp cover and conical cavity integrally to move up or down by which, and then the annular mouth of conical cavity lower end is moved up
Make several wedge shape fixture blocks gather clamping Superconducting Strand to center, or moving down makes several wedge shape fixture block dispersions unclamp superconduction stock
Line.
Used as the prioritization scheme of this case, on the mobile control piece, level connection joint has force application rod, is rotated by force application rod and is moved
Dynamic control piece.
Used as the prioritization scheme of this case, the force application rod is provided with 4 along mobile control piece even circumferential.
Used as the prioritization scheme of this case, the support shaft includes upper end path section, footpath section broad in the middle and bottom mounting disc, institute
State clamp cover and be sleeved on big footpath section, wedge shape fixture block is movably arranged in the card holding trough of bottom mounting disc respectively.
Used as the prioritization scheme of this case, the wedge shape fixture block includes upper end clamp block, lower end fixture block and middle interconnecting piece, wedge
Clevis block is movably arranged in the card holding trough of support shaft by middle interconnecting piece；When lower end fixture block is gathered to center, fixture block
Upper surface is in close contact with the bottom mounting disc of support shaft.
Used as the prioritization scheme of this case, the wedge shape fixture block is evenly arranged with 8 along annular.
Used as the prioritization scheme of this case, the part that the wedge shape fixture block is contacted with Superconducting Strand is processed as zigzag.
The invention has the beneficial effects as follows：
1st, using along the equally distributed multiple wedge grip block structures of annular, using the teaching of the invention it is possible to provide along the equally distributed clamping of strand annular
Power so that each stock uniform force of strand, effectively prevent each stock of Superconducting Strand and produces Relative sliding or the changing of the relative positions, it is ensured that strand reality
Test the degree of accuracy of data；
2nd, mobile control piece is changed to into pressure bearing form with the screw thread of conventional brace, bigger chucking power can be obtained,
Guarantee the firm of clamp position；
3rd, wedge shape fixture block can reach self-locking effect, carry out with experiment and press from both sides tighter and tighter, prevent test specimen lax or slide；Multiple clampings
Block so as to there are multiple contact surfaces with strand, chucking power is increased；
4th, the strand of different-diameter on the premise of fixture fixture block is changed without, can be clamped, it is applied widely；And according to actual folder
Hold the shape of test specimen（Circle, ellipse, triangular form etc.）Need, can pass through to change the number of fixture block and layout to reach optimal clamping
Effect；
5th, can normally use under room temperature and low temperature environment, it is rational in infrastructure, small volume and it is compact, disclosure satisfy that closed
The normal use requirement of test specimen experiment is carried out in cryostat, is suitable to popularization and application.
Description of the drawings
Fig. 1 is the structure sectional view of superconduction multi cord Self adapting fixture of the present invention；
Fig. 2 is the overall structure diagram of superconduction multi cord Self adapting fixture of the present invention；
Fig. 3 is the structural representation of support shaft in superconduction multi cord Self adapting fixture of the present invention；
Fig. 4 is the structural representation of mobile control piece in superconduction multi cord Self adapting fixture of the present invention；
Fig. 5 is the structural representation of clamp cover in superconduction multi cord Self adapting fixture of the present invention；
Fig. 6 is the structural representation of conical cavity in superconduction multi cord Self adapting fixture of the present invention；
Fig. 7 is the structural representation of pressure bearing in superconduction multi cord Self adapting fixture of the present invention；
Fig. 8 is the structural representation of jump ring in superconduction multi cord Self adapting fixture of the present invention；
Fig. 9 is the structural representation of wedge shape fixture block in superconduction multi cord Self adapting fixture of the present invention；
Figure 10 is superconduction multi cord Self adapting fixture of the present invention extension test schematic diagram at low ambient temperatures；
Figure 11 is the schematic diagram that superconduction multi cord Self adapting fixture of the present invention clamps Superconducting Strand；
Figure 12 is the pressure bearing cooperation schematic diagram of mobile control piece in superconduction multi cord Self adapting fixture of the present invention；
Figure 13 is the screw thread cooperation schematic diagram of mobile control piece in prior art；
Figure 14 is the clamping schematic diagram of flat chuck in prior art；
Figure 15 is the clamping schematic diagram of V-shaped chuck in prior art；
Figure 16 is the clamping schematic diagram of semi-circular recesses clamping path strand in prior art；
Figure 17 is the clamping schematic diagram of the suitable strand of semi-circular recesses clamping diameter in prior art；
Figure 18 is the clamping schematic diagram of the big footpath strand of semi-circular recesses clamping in prior art；
In figure：1- support shafts, 2- movement control pieces, 3- clamp covers, 4- conical cavities, 5- wedge shape fixture blocks, 6- force application rods, 7- pressure axis
Hold, 8- jump rings, 9- annular mouths, 10- card holding troughs, 11- cryostates, 12- Superconducting Strands, 13- fixtures, 14- guide rods, 1-1- paths
Section, the big footpath sections of 1-2-, 1-3- mounting discs, 5-1- clamp blocks, 5-2- connecting portions, 5-3- fixture blocks.
Specific embodiment
The present invention and its effect are further elaborated below in conjunction with drawings and Examples.
As shown in figs 1-9, a kind of superconduction multi cord Self adapting fixture, including support shaft 1, mobile control piece 2, clamp cover 3,
Conical cavity 4 and wedge shape fixture block 5, constitute the shell body of fixture by clamp cover 3 and conical cavity 4；Mobile control piece 2,3 and of clamp cover
Conical cavity 4 is sleeved in support shaft 1, wherein successively, and the middle part that mobile control piece 2 is connected with support shaft 1 is provided with pressure bearing 7,
The upper end of mobile control piece 2 is provided with jump ring 8 so that mobile position of the control piece 2 in support shaft 1 is relatively fixed；Mobile control
2 inwall of part is threaded connection with 3 top of clamp cover, and 3 bottom of clamp cover is fixedly connected with conical cavity 4；The activity of 1 lower end of support shaft
The several wedge shape fixture blocks 5 being provided with, wedge shape fixture block 5 are evenly distributed on the annular mouth 9 of 4 lower end of conical cavity, wedge shape fixture block 5 along annular
8 are preferably provided with, annular clamped object can be surrounded in all directions；Additionally, what wedge shape fixture block 5 was contacted with Superconducting Strand
Part is processed as zigzag, increases friction, it is ensured that the steadiness of clamping.During clamping, Superconducting Strand is placed on by wedge grip
The annular holder mouth that block 5 is formed, control piece in rotary moving 2 drive clamp cover 3 and 4 entirety of conical cavity to move up or down by which
It is dynamic, and then the annular mouth 9 of 4 lower end of conical cavity moves up and makes several wedge shape fixture blocks 5 gather clamping Superconducting Strand to center, or to
Lower movement makes several dispersions of wedge shape fixture block 5 unclamp Superconducting Strand.
Further, as shown in figure 3, the support shaft 1 includes that upper end path section 1-1, footpath section 1-2 broad in the middle and bottom are used
In the mounting disc 1-3 for installing wedge shape fixture block 5；Clamp cover 3 is sleeved on into big footpath section 1-2, the section is rotarily driven for mobile control piece 2
The stress section that fixture shell is moved on the whole or moved down, increases the diameter of axle so that fixture integrally meets intensity requirement.As shown in figure 9, wedge
Clevis block 5 includes upper end clamp block 5-1, lower end fixture block 5-3 and middle interconnecting piece 5-2, and wedge shape fixture block 5 passes through middle interconnecting piece 5-
2 are movably arranged in the card holding trough 10 of support shaft mounting disc 1-3；When lower end fixture block 5-3 gathers to center, fixture block 5-3's is upper
End face is in close contact with the bottom mounting disc 1-3 of support shaft 1, is limited wedge shape fixture block 5 and is moved up further, and then coordinates conical cavity 4
Annular mouth 9 on move banding wedge shape fixture block 5, it is ensured that enough chucking powers.
Further, edge moves the excircle level of control piece 2, is uniformly connected with 4 force application rods 6, by force application rod 6
Mobile control piece 2 is rotated, it is convenient to operate and time saving and energy saving.
As shown in Figure 10,11, in conjunction with Superconducting Strand extension test at low temperature, its implementation process is further explained
State：
1st, the stress retained part to Superconducting Strand 12（2 ~ 3cm of end）Simply wrapped up, anthropic factor is prevented to wire rod
Shape is damaged；
2nd, 13 upper and lower corresponding of fixture is put into into cryostat 11, then which is connected with electronic universal tester by guide rod 14；
The 3rd, the upper end wrapping portion of Superconducting Strand 12 is put into the fixture mouth of top fixture 13, force application rod 6 is then passed through along can subtract
Little mobile control piece 2 rotates mobile control piece 2 with the direction of 4 distance of conical cavity, that is, rotate down mobile control piece 2；
4th, restriction mobile control piece 2 is moved down with the relatively-stationary pressure bearing 7 in 1 position of support shaft, by movement control piece 2
Screw thread drive clamp cover 3 and conical cavity 4 to move up, after wedge shape fixture block 5 is contacted with 1 bottom surface of support shaft upwards, with taper
The lower end annular mouth 9 in chamber 4 is moved on continuing, and multiple wedge shape fixture blocks 5 will be made to draw close to center, so as to ring surrounds clamping test pieces；Adopt
In the same way the lower end of Superconducting Strand is gripped.
5th, cryostat is closed, carries out preparation and measurement work under low temperature environment；
When the 6th, unloading test specimen, mobile control piece 2 is rotated in the opposite direction, the jump ring 8 for being fixed on 2 upper end of mobile control piece will limit
Make which to move up, drive clamp cover 3 and conical cavity 4 to move down, wedge shape fixture block 5 separates, removal test specimen.
When the clamping of Superconducting Strand is carried out using this grip device, first, strand can be provided be uniformly distributed with annular
Chucking power so that each stock uniform force, reach the effect of synchro-draw, effectively prevent each stock of Superconducting Strand and produce and slide relatively
Move or the changing of the relative positions, it is ensured that the degree of accuracy of strand experimental data；Secondly, on the premise of fixture fixture block is changed without, can clamp not
It is with the strand of diameter, applied widely, and can be according to the shape of actual clamping test pieces（Circle, ellipse, triangular form etc.）Need, change
Become fixture block number and layout reaching optimal clamping effect；Additionally, by mobile control piece with the screw thread of conventional brace
Be changed to pressure bearing form, bigger chucking power can be obtained, it is ensured that clamp position it is firm（As shown in Figure 12,13）.It is closed
Cryostat in when carrying out the charge and discharge operations of test specimen, it is desirable to fixture can not be excessive, and the fixture mostly body that existing testing machine is provided
Product is huge, cannot use naturally.By testing machine provide fixture carry out after miniaturization, although can used in cryostat, but
Be retained part still for plane, V-shaped or the flat chuck with semicircle type groove, for the accuracy of test, the collection of data must
Must be away from gripping section, so as to need to suitably increase piece lengths so that the stretchable space of test specimen reduces；This grip device structure is closed
Reason, volume are small-sized, compact, disclosure satisfy that requirement is normally used in closed cryostat.
Above example is only exemplary, can't limit to the present invention, it should be pointed out that for those skilled in the art
For, under technology provided by the present invention enlightenment, other equivalent modifications made and improvement are regarded as the guarantor of the present invention
Shield scope.
Claims (7)
1. a kind of superconduction multi cord Self adapting fixture, it is characterised in that：Including being sleeved on support shaft successively（1）On mobile control
Part（2）, clamp cover（3）And conical cavity（4）, and it is movably arranged on support shaft（1）Several wedge shape fixture blocks of lower end（5）；Wherein,
Mobile control piece（2）With support shaft（1）Pressure bearing is provided with the middle part of connection（7）, mobile control piece（2）Upper end is provided with jump ring
（8）, make to move control piece（2）In support shaft（1）On position be relatively fixed；Mobile control piece（2）Inwall and clamp cover（3）On
Portion is threaded connection, clamp cover（3）Bottom and conical cavity（4）It is fixedly connected, wedge shape fixture block（5）Cone is evenly distributed on along annular
Shape chamber（4）The annular mouth of lower end（9）；Superconducting Strand is placed on by wedge shape fixture block（5）The fixture mouth of formation, control in rotary moving
Part（2）, clamp cover is driven by which（3）And conical cavity（4）Entirety is moved up or down, and then conical cavity（4）The annular of lower end
Mouthful（9）Moving up makes several wedge shape fixture blocks（5）Gather clamping Superconducting Strand to center, or move down and make several wedge shape fixture blocks
（5）Superconducting Strand is unclamped in dispersion.
2. superconduction multi cord Self adapting fixture according to claim 1, it is characterised in that：The mobile control piece（2）On
Level connection joint has force application rod（6）, by force application rod（6）Rotate mobile control piece（2）.
3. superconduction multi cord Self adapting fixture according to claim 2, it is characterised in that：The force application rod（6）Along mobile
Control piece（2）Even circumferential is provided with 4.
4. according to the arbitrary described superconduction multi cord Self adapting fixture of claim 1-3, it is characterised in that：The support shaft（1）
Including upper end path section（1-1）, footpath section broad in the middle（1-2）With bottom mounting disc（1-3）, the clamp cover（3）It is sleeved on big footpath
Section（1-2）, wedge shape fixture block（5）Bottom mounting disc is movably arranged on respectively（1-3）Card holding trough（10）It is interior.
5. superconduction multi cord Self adapting fixture according to claim 4, it is characterised in that：The wedge shape fixture block（5）Including
Upper end clamp block（5-1）, lower end fixture block（5-3）And middle interconnecting piece（5-2）, wedge shape fixture block（5）By middle interconnecting piece（5-2）
It is movably arranged on support shaft（1）Card holding trough（10）It is interior；When lower end fixture block（5-3）When gathering to center, fixture block（5-3）Upper end
Face and support shaft（1）Bottom mounting disc（1-3）It is in close contact.
6. superconduction multi cord Self adapting fixture according to claim 1, it is characterised in that：The wedge shape fixture block（5）Along ring
Shape is evenly arranged with 8.
7. superconduction multi cord Self adapting fixture according to claim 1, it is characterised in that：The wedge shape fixture block（5）With it is super
The part for leading strand contact is processed as zigzag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611141685.7A CN106525573A (en) | 2016-12-12 | 2016-12-12 | Self-adaptive clamp for superconductive multi-strand wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611141685.7A CN106525573A (en) | 2016-12-12 | 2016-12-12 | Self-adaptive clamp for superconductive multi-strand wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106525573A true CN106525573A (en) | 2017-03-22 |
Family
ID=58342109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611141685.7A Pending CN106525573A (en) | 2016-12-12 | 2016-12-12 | Self-adaptive clamp for superconductive multi-strand wire |
Country Status (1)
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|---|---|
| CN (1) | CN106525573A (en) |
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|---|---|---|---|---|
| CN107576561A (en) * | 2017-10-24 | 2018-01-12 | 中水北方勘测设计研究有限责任公司 | Shearing force box for the experiment of rock direct shear strength |
| CN109115598A (en) * | 2018-10-12 | 2019-01-01 | 济南大学 | One kind is based on separation taper card slot type wirerope clamp system |
| CN113295518A (en) * | 2021-04-14 | 2021-08-24 | 中国电建集团华东勘测设计研究院有限公司 | Tensile test clamping device suitable for test pieces with various cross sections and use method |
| CN114260763A (en) * | 2021-12-25 | 2022-04-01 | 唐山永丰轧辊有限公司 | Roll grinding device and method |
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